Observational judgment is not a replacement for instrumented measurement.

distinction — attributed to Mark Brewster

Brewster does not dismiss the gut read. He runs a wash-up inside the first hour after every event and considers it critical. But observational judgment has two failure modes: the team can sugarcoat what went poorly, or it can be hypercritical of what actually landed. Both directions distort the planning for the next event. The survey is the corrective, sometimes confirming the read and sometimes pushing back to say the session the team thought was thin actually rated highest in the room. Observational judgment is the referee on the field, calling it at full speed. The survey is the tape.

For experienced organizers whose instincts are well-calibrated but unbacked by instrument. The distinction matters most when the gut read and the data diverge.

observational-judgment, data-vs-instinct, debrief, measurement-discipline